Breed and sex differences in carcass composition have been studied by relating changes in major tissues to carcass weight (B a i l e y et al., 1966; B e r g and B u t t e r f i e l d , 1968). In contrast studies have also been made to investigate treatment response on component tissues on a fat-free basis ( B e r g and B u t t e r f i e l d , 1966; M u k h o t y and B e r g , 1971). The choice of different covariates has given birth to a controversial question of whether fat tissue should or should not be used as a covariate to evaluate treatment differences in carcass composition (Pa l s s o n ,
1967). The objective of the present research is (a) to elucidate breed and sex influence on relationships involving major bovine tissues and (b) to study the appropriateness of using common size dimension across breed or sex groups when three important carcass traits (muscle, muscle : bone ratio and percentage fat) are regressed, one at a time, on various control dimensions (muscle, bone, muscle plus bone, cold carcass weight).
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 3, Madrid, Spain, 839–849, 1974
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